Redundant Acronym Syndrome Syndrome. It's the phenomenon of using acronyms to describe a noun, when the noun is itself already in the acronym. A short list is included below.
ATM Machine (Automatic Teller Machine Machine), PIN Number (Personal Identification Number Number), RAID Array (Redundant Array of Independent Disks Array), AC/DC Current (Alternating Current/Direct Current Current), LAN Network (Local Area Network Network), RPG Game (Role Playing Game Game), ISBN Number (International Standard Book Number Number), HIV Virus (Human Immunodeficiency Virus Virus), and RAS Syndrome itself (Redundant Acronym Syndrome Syndrome).
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